PDF malware analysis — malicious · 119c12d0ebb31c22

MALICIOUS

PDF

90.6 KB Created: 2021-09-05 09:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 29d85720c49357565df896c748f70897 SHA-1: 93f8bc837203ad9ef3f58fa7dd071f14749b3270 SHA-256: 119c12d0ebb31c22f693c2f106f6a0e9b520d3ccf5373cb737730eeb7ee3950c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, many of which host other PDF files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the nature of the links and the heuristic firings suggest a mechanism for redirecting users to malicious content, potentially leveraging embedded JavaScript within the PDF structure.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820745e4491---xozokanarabe.pdf In PDF document text
- http://robbes.nl/media/files/9105546755.pdfIn PDF document text
- https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/e42d2c75af0150da5e5337f74879378a/14057035682.pdfIn PDF document text
- https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d72a9183e5---37458177418.pdfIn PDF document text
- http://analogsys.com/uploaded/file/89824578360fdec749eb30.pdfIn PDF document text
- http://mixmarketing.vn/upload/fck/file/dutuzikepapariloj.pdfIn PDF document text
- http://assessmentinsight.com/ckfinder/userfiles/files/92016945602.pdfIn PDF document text
- https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f575c1a8f5d---3815135229.pdfIn PDF document text
- https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/113ba45d5c06d77dd94c524027fbe4af/46613604243.pdfIn PDF document text
- http://mazdooradda.com/userfiles/file/kopapam.pdfIn PDF document text
- https://mokhalasati.com/userfiles/files/82828626567.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b281173d2d0---3100124587.pdfIn PDF document text
- http://aelma.com/sites/default/userfiles/file/vodalawulirabanamufa.pdfIn PDF document text
- https://blugarden.eu/file/zawomiselijixafepa.pdfIn PDF document text
- https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/fba792f20fea3abcf1a9e237c1341152/59751685697.pdfIn PDF document text
- https://dolupin.com/calisma2/files/uploads/84097306314.pdfIn PDF document text
- http://www.alcera.ca/userfiles/file/popudefimovovonolifi.pdfIn PDF document text
- https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/c98dffddce9e5466b93385d5b3968f16/42935529397.pdfIn PDF document text
- http://medica-eg.com/userfiles/file/foropuw.pdfIn PDF document text
- http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609447e52e2ca---64321105759.pdfIn PDF document text
- http://csc-0898.com/userfiles/file/20210720144216_fdtkfh.pdfIn PDF document text
- http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/fb0f849ade0413c2bcc1cb594788426b/sekixulopusigowumumuj.pdfIn PDF document text
- https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/lc0g5ouj3fc0472jv27mgt3rmu/juzugalipirawix.pdfIn PDF document text
- http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160853f5f0ae64---55606923222.pdfIn PDF document text
- http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160cb416f8bc96---wigemiminirigozopekudizu.pdfIn PDF document text
- http://school19-zav.ru/userfiles/file/fojirapuredefomoxu.pdfIn PDF document text
- https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c12c7c847---juzek.pdfIn PDF document text
- http://fotosvatba.net/userfiles/file/39346443463.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=ethiopic+didascalia+pdfPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f789.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF789	19740 bytes
SHA-256: `ddccd7ea572786aed2afd66a53da629308a9723dc31ebc0ff3eccf9f65b784f4`
`font_01_sfnt_off00012bb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BB5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000143cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x143CC	10364 bytes
SHA-256: `94dbf31151d1df4fdc58f17b7c0a8423a4fbdedc54d27225a0994aa84e5eebdd`

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